body{
    background:wheat;
    margin: 0px;
    padding: 0px;
}
.header{
    background: brown;
    height: 80px;
    width: 100%;
    position: fixed;
    top: 0px;
}
.placeholder{
    background:wheat;
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 80px;
}
.logo{
    position: relative;
    top: 17.5px;
    left: 50px;
}
.nav{
    float: right;
    margin-right: 20px;
}
.nav-li{
    display: inline;
}
.chapter{
    margin: 20px;
    background: white;
    border-width: 0px 5px 5px 0px;
    border-style:solid;
    border-color: gray;
    box-shadow: 2px 2px 3px #aaaaaa;
}
.listTwo{
    list-style-type : none;
}
.imgDiv{
    border: 2px solid black;
    width: 120px;
    height: 120px;
    margin: 20px;
}
.imgDiv img{
    margin:auto;
}
.imgDiv p{
    text-align: center;
    margin: 0px;
}
.chapter3img{
    display: block;
    width: 80px;
    height: 80px;
}
.tablecls{
    border-collapse: collapse;
    width: 100%;
}
th{
    text-align: center;
    background: black;
    color: white;
}
tr.trSum td{
    background-color:#EAF2D3;
}
form {
	text-align: center;
}
.submitBt{
    width: 100%;
    background: blue;
    color:white;
}
.footer{
    text-align: center;
}